According to Nike’s press release
, a wearer’s heel will hit a sensor that will automatically tighten the sneaker around the foot. The shoe also includes two buttons that will tighten and loosen the laces.

Nike first developed the technology for use in their “Air Mag” model, a shoe designed to look exactly like the pair that Marty McFly wears in Back to the Future Part II. Nike only produced 1,500 pairs of AIr Mags, which routinely sell for thousands of dollars on eBay.